Valve device



Jan. 1, 1935. E. E. HEWITT 1,986,475

' VALVE DEVICE 4 Original Filed July 7, 1952 EL LIE E. HEWITT v A TTORN Patented Jan. 1,1935

'I hisinvention relateslto. valve structures and particular1y-' to" cut-off valves such as are em'- "played in; branch'pipesof fluid brake equipment vision of application Serial No. 621,238, .filedJuly "1, .1932. i y W the seat rib, forces the rib into engagementwith l Fig.- 2 is a top plan" viewof of thevalve casing and diaphragm.

4o, ;.=Referring to the drawing, the cut-off valve for,controllingthe-supply iof fluid. under pres-H surezfrom the brake pipe to the brake controlling valve device, the present application being adi- ,Anpbjectof theinvention to provide a cut-l offivalve' device'th'at .mayber combined with a dirt collector? device such as thatdisclosed iin theuorigin'al application, so that. the casing of such deviceconstitutes apart of the=enclosure for the valve of the cut-01f valve devicef -Afurther O'bjGCllrOf the. invention is. to provide,

a valve ofwthe diaphragm. typewhereinthe diaLl' phragm :is. provided with an annular underecuts seat rib for engaging a fiat annulars seat sur-xroundinga fluid passage; whereby the fiuid under ressure acting onthe. inner 'under-cut wallaoi thievseat, and, thereby. assists in maintaining. a. when the valve is in' closed position.

a -11; x I x A further object of the'inventionfiisto pr vide, a simpleiinexpensive andjfpositive means; for

operating the valve diaphragm to open and closed positions. I}

H These and other object s o f the-inventionthat will jbeihade apparent throughout the iurther description thereof, are attained by means ofv ,the fluid brake equipment hereinafter described,

device comprises a casing 11, that is secured by means of bolts 12 to the attaching face'l13wof al dust "collector casing. 14, such as is; disclosed in the above mentioned application. The casing 14 is provided with the usual inlet and outlet con-' nections 15 and 16, respectively, which communicate with the brake pipe and brake controlling .valve devices (not shown) respectively, and with the inlet passage 1'7 and-outlet passage 18; rep 50 spectively, of the dirt collector casing. The attaching face 13 of the dirt collector casing is provided with a fiat surface surrounding a passage 19 opening from the inlet passage 17,

and which constitutes a fiat seat for cooperating with a diaphragm valve for closing communica- DEvIcE f Ellis E. Hewitt, skigjvg pmiyr westingliouseAir Brakeoompaiiy; wiimraing, a a co tion fir nn r mnia a; N6...

,1 Original application, Iuly 7, q 621,238. Divided and this applic n 91 3! S ria N).-,6,5952.57 I k as ign a The tionabetween the inlet. passageslfl and theoutlet. passage 18.

Thelcasing11 contains a. diaphragm typevalve 21; and has a chamberi'22i. onpneside arida chamber 23;;on the oppositeflsid'e; the; said diaa phragm :being 1 provided. with an under-cut annular seatribl 24 that is. adaptedtobe moved into. engagementrwith the faced? Tof the casing 14andto close the opening 219. imthe .passage lil ,that'is open 'toithe connection 15; ofalthe casing 14. :The diaphragm waive .21 is. 1 adapted to be clamped between the casing f1- 1x andsth attaching face 13 of the dirt collect on-leasing 14A if :The :diaphragm valve 1; is imanu'ally'r operable by means ofwa plunger-.25 'slidably rrountedwithin thechambei: 623' and: which engages a; centering projectiomZfi driithe outer face of the diaphragm valve '21.. The. projection" fits into-aflshalldwarecessi27rinftheinner races: the'plunger25. The

plungen' is: movediitoward the diaphragm. .bya cam' 28,;fixed upon a shaft 129; by a pinix31, the. shaft extending throughfoppositely disposed slots 30 in .theirplunger-25 .(dne ofJwhich is-shown).

:' and Ythrough. the casing 11, e'xteriorly 0f.

the casing 11, the shaft iszprovidedwith amanually operable handle 323i. f

T When': the. shaft 29 is rotatedby means of the operating handle, the plunger" is forced inwardly by .the.cam;which engages ahardened plate .2:

'on-the plunger and the seat :-rib..24 is positivelyforced ,into'sealing: engagement with the face. 13 of. the. casing' 14, thereby. closing communication between the passages 17 and* 18. The annular, seat rib '24, of the diaphragm valve "21 .being under-cutyfiuid ,pressurfeginptherecess 33 in the diaphragm valve supplied .from the brake pipe through passage 19;actsi upon the undercut wallgof'theriba 24 andforcesithe rib against the seat "face .13 surrounding the opening Y19, and

assists inxmaintaining a: fluid tight seal-6 This valve isclosed when itisfdesired'. to cutx out the associatedxbrake controlling svalve' device. The valve held closed so longzl as ithecircular portion of the cam 28 engages the plate '2 of the plunger. 1 While but one embodiment of the improved cut-01f valve device is disclosed as applied to a dirt collector for fluid brake equipment, it is obvious that the valve device is. applicable to a variety of fluid controllingdevices and that changes may be made in the construction without departing from the spiritof'the invention. Having now describedmy invention, what I. claim as' new and desire to secure-by Letters Patent, is: V

fluidiunderf'pressurefor assisting in forcingsaid- '30-: 'for assisting .in forcing said rib into-"engage- 1. A diaphragm valve comprising a disc of flexible material having an integral annular sealingl s eat 3. A" diaphragm valve comprising a flexible pressure acting on the under-cut portion of said rib assistsin forcing it into 'engageme said seat.

nular seat rib on the side of the diaphragm subject to fluid pressure, the saidrib having a-wallunder-cut and adapted to be acted upon by rib into engagement with said seat; 'C

onersi'de for making sealing engagement with a valve seat, and having a recesson one sideand than'said recess'andhaving its inner wall sub-1 ject'to fluids'under pressure within said recess ,mnt.' withfsaid seat.

6. A diaphragmnvalve device comprising a seatiand va flexible diaphragm for making sealing engagementwith said seat and adapted to, bersubjected on one side to fluid under pressurean'd' having on2 said :side an annular seat rib for engaging saidseat and'surroundingv a recess in said diaphragm and defining an opening into saidre'cesso'f less cross-sectional areathanthe majori' cross-sectionalarea'of said recess, soxas to provide; a wall on, said rib adapted to .be" acted' upon :by' said fluid under 1 pressure within? the recess to assist in forcing the'rib intov sealingiengag'ement withavalve .seat. :5

tion with 'avcasingi-having a valve chamber and an'izopenin'g through which fluid under pressure may flow-into said chamber and a valveseat surrounding 'said'bpening, and a diaphragm valve withinsaid' chamber, of a flexible undercut" annular seatlrib carried by Saiddiaphragm adapted to engage said-seat and to be pressed into sealing "contact therewith by fluid under pressure supplied through said opening. 8; In a diaphragm valve device, the combination? with a casing. having a valve chamber and anopening throughvwhich fluid'underpressure may flowfintoi said chamberjand, a valve seat surrounding said opening, of a diaphragm valvewithin: said ehamberihaving a recess oppositesaid'iopeningsurrounded by an annular undercutzseat ribhaving'an inwardly inclined flexible I with I P .f v fseat for closing said opening, of a means on said 4. A diaphragm valve adapted to be subjected upon one side to fluid under p1 1e ssure'-comprising a flexible diaphragm having'anintegral "an-*- L iA diaphragmi'valve comprising a flexible diaphragmsubject' to'fluid under pressure on tion with a casing having a valve chamber and an'opening through which fluid under pressure may flow into said chamber, a valve seat surrounding said opening. and a diaphragm valve within saidchamber and cooperating with said diaphragm valve adapted to be acted upon by fluid under pressure supplied through said openinj'g'jwhen'the valve is in engagement with its seatfor forcing a portion of said diaphragm in sealing engagement with said seat.

10. In a diaphragm valve device, the combination with a'casing having a valve chamber and an opening through which fluid under pressure.

may flow into said chamber, a valve seat surrounding said Opening and a diaphragm valve within said chamber and cooperating with said seatfor. closing said opening, of means for forcing. saidi diaphragm valve into sealing engagement with said seat and for releasably holding said diaphragmin" seated position, and means acted upon by fluid supplied through said opening While said diaphragm valve is seated for increasing the force with which said diaphragm valve is forced into sealing engagement with said seat .liilr In-ai diaphragm valve device, the combination-with acasing having a valve chamber and an opening ,through which fluid under pressure may flow intosaidchamber, avalve seat surrounding said opening and'a diaphragm valve within saidchambershaving a flexible under-cut annular seat "rib adapted to engage said seat and to be pressedixinto sealing'conta'ct therewith by fluid under pressure supplied through said opening, and means for moving said diaphragm into enr} gag'ement with said seat and for supporting it 7. In a diaphragm valve device, thecombin'a-e may ffl'ow into said chamber, a valve seat surrounding said opening" and a diaphragm valve withinsaid chamber having a flexible under-cut annular seat'rib adapted to engage said seat and to be pressed into sealing contact therewith by fluid under pressure supplied through said opening, and means for supportingsaid diaphragm opposite said annular seat rib and for moving saidrdiaphragminto sealing engagement with saidseate ELLIS E. HEWITT. e 

